Relationship between the Vibration Acceleration and Stability of a Continuous Girder Bridge during Horizontal Rotation

Wenxue Zhang, Kun Liang and Ying Chen
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Wenxue Zhang: Key Laboratory of Earthquake Engineering and Structural Retrofit of Beijing, Department of Civil Engineering, Beijing University of Technology, No.100 Ping Leyuan, Chaoyang District, Beijing 100124, China
Kun Liang: Key Laboratory of Earthquake Engineering and Structural Retrofit of Beijing, Department of Civil Engineering, Beijing University of Technology, No.100 Ping Leyuan, Chaoyang District, Beijing 100124, China
Ying Chen: Key Laboratory of Earthquake Engineering and Structural Retrofit of Beijing, Department of Civil Engineering, Beijing University of Technology, No.100 Ping Leyuan, Chaoyang District, Beijing 100124, China

Sustainability, 2022, vol. 14, issue 10, 1-17

Abstract: To ensure the safety of bridges during horizontal rotation, we propose a method through which it is possible to evaluate the stability of structures in real time by measuring the vibration acceleration of the rotating structure. First, the vibration characteristics collected during the horizontal rotation of a typical high-speed railway bridge were compared with the results of a finite element analysis. Second, the analytic formula to calculate the ratio of vibration acceleration and the pier-bottom-section bending moment for the rotating structure was deduced by considering the beam and pier as an infinite-degree-of-freedom rod. Then, the results of the analytical formula were compared with those of the finite element calculation. Overall, the results showed that the bending moment of the pier bottom (which was related to the stability of the rotating bridge) was affected only by the two asymmetrical vibration modes. The analytic formula built by considering the beam and pier as an infinite degree-of-freedom rod with equal cross-section effectively described the relationship between the vibration acceleration and pier-bottom-bending moment. Finally, the vibration of the rotating bridge was simplified to the superposition of the first two asymmetric vibration modes in the facade. Based on our findings, we were able to provide a formula and some check tables to calculate the permissible value of vibration acceleration for typical high-speed railway bridges.

Keywords: horizontal rotation; construction monitoring; vibration; acceleration; stability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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